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UNITED STATES PATENT FFICE GSTAF M. ANDERSSN, OF NEWARK, NEW JERSEY, ASSIGNOR TO THE UNITED STATES BUTTER EXTRACTOR COMPANY, OF NEW YORK, N. Y.

CENTRIFUGAL BUTTER-EXTRACTO R.

SPECIFICATION forming part of Letters Patent No. 519,691, dated May 15, 1894.

Application filed August 28,1890. Seria.l No. 363,364. (No model.)

T aZZ whom it may concern:

Be it known that I, GUSTAF M. ANDERSSON, a subject of the King of Sweden and Norway, and a resident of Newark, county of Essex,

State of New Jersey, have invented certain new and usefu1 Improvements in Centrifugai Butter-Extracting Apparatus, of which the alesce and form palpable masses of butter.

The invention consists of a new centrifugal cream disturber or butter separator consisting of obstaoles spirally arranged against which obstacles the crarn works and wneretances from the axis of revolution.

by the particles of butter fat are separated from the particles of b1ue milk and the particles of butter fat caused to coalesce and form palpable masses of butter. These spira1 obstacles may be arranged as steps or ridges and at successively increasing dis- Theymay be arrangedcylindricaily, conically or flat.

When my entire invention is used the spira1 obstacles are arranged on a substantially flat surface and the cream is caused to traverse a spira1 path and over steps arranged along spiral walls and is thereby worked and the butter separated. v

My entire invention al so inciudes the combination of the butter separator with a cream separator, the butter separator being connected to and arranged to revolve with the cream separator and to receive separated cream from the cream vvall formed by centrifugal actiou in such cream separator.

In the accornpanying drawings Figure 1 is a vertical section on the line 5-5, Fig. 2, of a cream separator and butter separator containing my complete invention, and Fig. 2 is a horizontal section of the same on the line 66,Fig.l. Figs. 3, 4, 4 and 5 showa modi- Fig. 3 is a vertical central seotion. Fig. 4: is a horizontal section on the line 2-2, Fig. 3. Fig. 4? is an enlarged horizontal section of the butter separator on the line4-4,Fig.3. Fig. 5 is avertical section of the centrifugal drain on the line 3-3, Fig. 4.

The frame of the apparatus consists of the fixed casing b, provided with a removable cover Z), and supported by a suitable base a of ordinary construction, the upper portion only of which is shown. a is arranged vertically and rotatively mounted in bearings of the usual constructon. The upper bearing 0 is shown in Fig. 1. Its upper part is covered bya cap secured to the oasing 12. The separatng drum d is securely fixed upon the upper end of the operating shaft c. In the operation of the apparatus this drum is revolved at a r-ate of from six thousand to eight thousad revolutions per minute.

The milk or cream is supp lied preferably in a conti1uous but reguiated strearn, through the tube f, which is stationary and extends downward to the lower part of the drum. A spread cup of the oonstruction shown and clairned in Letters Patent granted to me De cember 6, 1892, No. 487,316, application filed J une 30, 1890, under Seriai No. 357,307, is arranged at the bottom of the drum adjacent to the mouth of the tube f. This spread cup comprises an inclined partition g, supported just above the bottom of the drum with en opening all around between the lower edge of the partition and the bottom of the drum, radial ribs or blades 9 for imparting rotation to the fiuid passing through the spread The operating shaft cup, and a oentrai spreader 9 The milk or cream passes down from the mouth of the feed tube f, to the spreader 9 and is then thrown outward and revolved by the blades g, and passes under the partition 9, and out toward the periphery of the drum d. Radial blades h are provided in the drum d, to compe1 the liquid to partake of the revolution of the drum. The intense centrifugal force resu1ting from the rapid revolution of the drum causes a separation of the particles of the fluid and a re-arrangernent of these particles according to their specific gravities, so that the heavy b1ue milk is near the periphery of the drum and the light cream is nearest the center or axis. The inner periphery of the cream wall will be about in the position indi cated by the dotted lines 0c. An inclined inwardly extending partition k is formed in the upper part of the centrifugal drum d similar to the partition shown and claimed in my application above referred to, filed Ju ne 30, 1890, Sera1 No. 357,307. The inner edge or lip of this partition is located in the cream wall of the drum, and theseparated cream rises above this partition 70. The top of the drum has a large circular opening,the wall of which is of about the same diameter as that of the inner lip of the partition 7, and in the side of this large opening, the small passage or opening is formed whereby the cream passes into the cream disturber or butter separator. An inwardly extending flange overhangs this large opening and prevents the escape of the cream otherwise than through the passage 0". The outlet for the blue milk is provided by the two inelined tubes 1I, extending rom points within the drum near the outer wall of the drum, downwardly and out of the drum. A receiver j is formed in the bottom of the casing b, into which the blue milk passes from the mouths of the tubes 2, and a spout j leads from this receiver out of the apparatus.

\Vhen my entire invention is used, as shown in Figs. 1 and 2, the centrfugal cream disturb er or butter separator is monnted u pon the top of the drum. It consists of a flat disk q having a vertical wall extending up from the same, snch wall winding around the disk q in a spiral line. The inner face of this spiral wall has steps or projections q formed upon it throughout its length. The spral passage or groove between adjacent parts of the wall forms a spiral passage or path for the cream or butter. The separated cream flows through the passage 1 and into this spiral groove,and passes outward from the center through such groove. The intense centrifugal force presses it against the toothed or stepped surface of the wall so that in thus passing outward it is thrown from step to step and agitated and worked, and by this agitation the butter fat globules are separated from the blue milk and are caused to coalesce and adhere together butter finally escapes from the separator at separator.

the outer end of the spiral wall and is thrown into the butter receiver Z. This butter receiver Z is [ixed in the upper part of the casing, and has a spout Z which conveys the butter out of the apparatus.

In the modified construction shown in Figs. 3, 4:, 4 and 5 the eentrifugal cream separating drum is substantially of the same construction as that heretofore described, but in place of the inclined partition 7a I providea flat annular sl1elt consistng of an enter rim 7, which forms a partition in the drum, and an inner rim owhich extends over the butter The butter separator or cream disturber is arranged witl1n the drum and consists of a conical tube 0, provided interiorly with a series of spirally arranged steps 0, 0. The lower and smaller end of the conical tube 0 is fitted upon the inclined parti 7o tion g, and is partly closed but provided With an opening for the passage of the feed tube f. The steps 0 are arranged at sucoessively increasng distances from the axis of revolution and in suecessively higher planes en a spiral line winding conically around, upward and away from the axis of revolution. This conieal and spiral cream distnrber or butter separator may be readily constructed by formiug the steps 0 in a straight metallic strip, and then winding such strip spirally within the conical tube 0. The steps 0 are preferably shaped of tapering form, with their greatest projection at the corner of the tooth whieh is uppermost. The top ofthe eonical tube 0 is a short dstanee below the top of the drum d, in line with the annular shelf formed of the outer rim and the i11- ner rim 0 The inner rin1 0 extends over the cream disturber and prevents escape of butter therefrom exoept at the proper passages. An annular chamber is formed between the top of the butter separator and the top of the drum, that is to say, between the partition 7.2 and the annular inwardly extending rim cl' at the top of the drum. The partition k is provided with pertorations or passages arranged just inside the cream wall.

The cream flows up througl1 these passages and into the annular chamber at the top of the drum, and forms a cream wall in such charnber which is virtually part of thecream wall of the drum. A conduit 19 is provided for oonveying the cream from this upper cream wall of the drum to the bottom of the butter separator, and is rotatively fitted in the cover 1) of the casing of the apparatus, and has a curved projecting arm or scoop 19', which extends into the upper cream wall above the partition 70, and is curved at its lower end, and has a continuous passage ex IOO IIO

tending from the end of the arm 19' to the curved lower end of the conduit. An arm p is secured to the upper end of the conduit p, outside the casing, and is provided with a clamping handle. The manipulation of this ar1n will adjust the position of the scoop arm 19' in relation to the cream wall. The cream passes through the arm 19' and downward and out throngh the curved lower end of the conduit and is thrown with considerable force against the lower end of the butter separator. Ahigh velocity is thus im parted to the cream, and the intense centrifugal force is tending to move t away from the axisof revolution. The cream will there fore be pressed against the interior walls of the butter separator and against the steps 0 of such walls, and will rise upward in such butter separator, following quite close1y the spiral form of the steps, and will thus be considerably agitated and thrown trom step to step. 'lhis agitation will eause the butter fat glob ules to separate and coalesce and form pal pab1e masses of butter.

The separated butter will eventually pass through the opening 0 in the rim 0 and then radially outward through the passage 0 and fina1ly into the butter receiver Z.

A fluid supply device is usually provided to afford a supply of lubricating and temperature regulating fluid, such as water, brine or 1nilk, to the butter separator. This fluid supply device consists of a pipe m, held in the top 12' of the casing and extending downward and provided with ons or more nozzles m In Figs. 1 and. 2 this fluid snpply duet extendsinto the separating drum, and is provided with nozzles m m arranged just be- 1w the inner edge of the top of the drum. In Figs. 3, 4, 4" and 5 it extends downward inside of the butter separator and has a single nozz le m at its lower end.

The modified construction shown in Figs. 3, 4, 4 and 5 is c1aimed in a separate application filed by me April 1, 1891, under Serial No. 387,202, and is therefore not c1aimed herein.

It is evident that 1ny broad invention is oapab1e of many modifications, and that parts of my complete invention may be separately nsed. The cream disturber or butter separator may be used without the drum or with a drum of different construetion.

The fluid supply device and the spread cup shown heren are claimed in my above mentioned patent, No. 487,316,iss11ed December 6, 1892, and are therefore not claimed herein.

What 1 claim is- 1. In a centrifugal butter extracting appa ratus, the oombination with means for imparting rotation to the milk or cream, of a butter separator consisting of obstacles spirally arranged, substantially as set forth.

2; In a centrifugal butter extraeting apparatus, a centrifugal butter separator fitted to .rotate and eonsisting of obstacles spirally arranged, and. means for revolving the butter separator, substantially as set forth.

3. In a oentrifugal butter extraeting appa ratus, the combination of a oentrifugal eream separator and means for revolving it, with a butter separator conneoted to and arranged to revolve with the cream separator and. consisting of obstacles spiraliy arranged about the axis of revoiution, substantially as set forth.

4=. Aeentrifugalbutter separatorconsisting of a spirally shaped wallprovided with ridges or steps on its inner face, in combination with means i'o1 imparting rotation to the mi1k or cream, substantially as set forth.

5; In a centrifugai butter extractor, the combination of a eream separating drum and means for revo1ving it, with a butter Separator eonnected to the drum and arranged to revo1ve with the drum and. to receive the cream from the inner eream wallof the drum, and consisting of a spirally shaped wall provided with ridges or steps on its inner face, substantiaily as set forth.

6. The eentrifugal butter separator consisting of the diskqand the spirally shaped wall" on such disk provided with steps q, and means for revolving the same, substantially as set forth.

7. The eentrifugal butter extraotor, consisting of a cream separating drum and. means for revolving it, in combination with the disk q mounted upon such drum, the passage rarranged to receive the separated cream from such drum, and the spirally shaped wal1 on the disk q, provided with steps q, substantiaily as set forth.

8. A churning attachment for a centrifugal vessel having a passage-way to receive the continuously separated cream and means for agitating the cream located in said way, whereby the butter fat is developed in the cream during its eentritugal flow toward the outlet from said way, substantially as set forth.

9. In a centrifugal machine, a separator vessel provided with a churning receptacle having a passage way to receive the oontinuously separated eream and means for agitating the oream located in said way, whereby the but ter-fat is developed in the eream during the centrifugal flow toward the outlet from said way, substantially as set forth.

GUSTAF M. ANDERSSON.

Witnesses:

EDWIN SEGER,

WILLIAM G. WEINBERG. 

